Over the past few months years I've seen very mixed success at using the built in voice recognition on Apple and android devices - often variations in accent and pronunciation cause significant barriers to users - So I was really pleased to see this update that you can now provide a degree of training to Siri to recognize your voice - one of the major factors in people with a disability using Siri or similar is that they feel confident that the technology will do the right thing when asked, avoidance of the frustration factor is essential in maintaining uptake of an AT. That's as true of Siri as any other access tools
So have a look at this article and video to learn more